const fs = require('fs')
const path = require('path')
url = path.join(__dirname, 'txt', '2.txt')
console.log(url)
fs.readFile(url, 'utf-8', (err, data) => {
  if (err !== null) {
    return console.log(err.message)
  }
  console.log(data)
})
console.log('我是最后一行')